survivors said one captor spoke excellent english and may have been from canada and that many terrorists were dressed as security guards. making the decision to run for it difficult. >> when you don't know what's out there, and we know that the terrorists threat seem security forces, it was a huge decision, do you stay or do you go? >> reporter: the rogue al qaeda leader, mokhtar belmokhtar, has now taken credit for the attack according to an african website today. we and al qaeda announced this blessed operation he was reported to have said. the chairman of the house intelligence committee told abc news, the u.s. new the al qaeda group was looking for a western target in the area. we didn't know it would be this place under those circumstances, but we knew they were trying to find and complete a target against a western target which this clearly was. >> of the ten americans at the plant, seven escaped or were freed. one is confirmed dead. still no word, but growing concern about the fate of two others who are believed to be inside during the final assault, david, by the agjeerian army.